dm: usb: Adjust the USB_DEVICE() macro naming

In Linux USB_DEVICE() is used to declare a USB device by vendor/device ID.
We should follow the same convention in U-Boot. Rename the existing
USB_DEVICE() macro to U_BOOT_USB_DEVICE() and bring in the USB_DEVICE()
macro from Linux for use in U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 637ef3d..3fa5b2e 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -46,8 +46,8 @@
 
 	  Much of the code is shared but with this option enabled the USB
 	  uclass takes care of device enumeration. USB devices can be
-	  declared with the USB_DEVICE() macro and will be automatically
-	  probed when found on the bus.
+	  declared with the U_BOOT_USB_DEVICE() macro and will be
+	  automatically probed when found on the bus.
 
 source "drivers/usb/host/Kconfig"